Morphological Response and Nutritional Deficiency Symthoms in Ipe Seedlings (Tabebuia Serratifolia) / Respostas Morfológicas E Sintomatologia De Deficiência Nutricional Em Mudas De Ipê (Tabebuia Serratifolia)

Abstract

The yellow ipe (Tabebuia serratifolia Vahl Nich.), is a forest species of relevance in Brazil, with characteristics of timber, medicinal, ornamental and cultural interest, in addition, the species stands out in reforestation activities in degraded areas. Mineral nutrition directly affects the production of seedlings, being a very important factor in the productivity of forest stands. Based on that, the present work aimed to evaluate the morphological responses, accumulation of dry matter, quality of seedlings, as well as the characterization of the symptoms of nutritional deficiencies in seedlings of yellow ipe (Tabebuia serratifolia), under individual omissions of macronutrients and micronutrient iron. The design was used in randomized blocks, adopting eight treatments: Complete solution, and individual omission of N, P, K, Ca, Mg, S and Fe, with three repetitions each. The omissions of N and Ca were those that most compromised the dry matter accumulation of the yellow ipe seedlings. The omissions of nutrients limited the relative growth of the seedlings, presenting the following order of growth: N<Ca<Mg<S<K. Omissions of N, Ca, Mg, S and Fe promoted a reduction in the chlorophyll index, besides manifesting deficiency symptoms. The omission of K manifested symptoms of deficiency, but did not affect the variables assessed. No effect of the omission of P was observed in the seedlings of yellow ipe.